title: Electron microscopic demonstration of negative charges on cell surfaces by means of protamine-ferritin conjugates.
mesh_terms: D004910:Erythrocyte Membrane / Q000502:physiology* / Q000648:ultrastructure; D004912:Erythrocytes / Q000502:physiology*; D005293:Ferritins; D006801:Humans; D008854:Microscopy, Electron; D011479:Protamines; D011485:Protein Binding; D013499:Surface Properties
chemical_list: D011479:Protamines; C018943:ferritin-protein conjugates; D005293:Ferritins